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Sodium carbonate
Product details:
- Product Name: Sodium carbonate
- Formulas : Na2CO3
- Chemical composition : China-technical-40kg
- Product Type: Chemicals for pool
Product description :
Sodium carbonate (also known as washing soda or soda ash), Na2CO3 is a sodium salt of carbonic acid. It most commonly occurs as acrystalline heptahydrate, which readily effloresces to form a white powder, the monohydrate. Sodium carbonate is domestically well known for its everyday use as a water softener. It can be extracted from the ashes of many plants. It is synthetically produced in large quantities from salt (sodium chloride) and limestone in a process known as the Solvay process.
Identifiers | |
---|---|
CAS number | 497-19-8 ![]() 5968-11-6 (monohydrate) 6132-02-1 (decahydrate) |
PubChem | 10340 |
ChemSpider | 9916 ![]() |
UNII | 45P3261C7T ![]() |
EC number | 207-838-8 |
ChEBI | CHEBI:29377 ![]() |
ChEMBL | CHEMBL186314 ![]() |
RTECS number | VZ4050000 |
Jmol-3D images | Image 1 |
Properties | |
Molecular formula | Na2CO3 |
Molar mass | 105.9784 g/mol (anhydrous) 124.00 g/mol (monohydrate) 286.14 g/mol (decahydrate) |
Appearance | White solid, hygroscopic |
Odor | Odorless |
Density | 2.54 g/cm3 (anhydrous) 2.25 g/cm3 (monohydrate) 1.51 g/cm3 (heptahydrate) 1.46 g/cm3 (decahydrate) |
Melting point |
851 °C (anhydrous)[1]
100 °C (decomp, monohydrate) 33.5 °C (decomp, decahydrate) 32 °C (heptahydrate) |
Boiling point |
1633 °C (anhydrous)
|
Solubility in water | 7 g/100 mL (0 °C) 21.6 g/100 mL (20 °C)[1] 450 g/L (100 °C)[2] |
Solubility | insoluble in ethanol, acetone |
Basicity (pKb) | 4.67 |
Refractive index(nD) | 1.485 (anhydrous) 1.420 (monohydrate) 1.405 (decahydrate) |
Structure | |
Coordination geometry |
trigonal planar |
Thermochemistry | |
Std enthalpy of formation ΔfH |
−1131 kJ·mol−1[3] |
Standard molar entropy S |
136 J·mol−1·K−1[3] |
Hazards | |
MSDS | MSDS |
EU Index | 011-005-00-2 |
EU classification | Irritant (Xi) |
R-phrases | R36 |
S-phrases | (S2), S22, S26 |
NFPA 704 | |
Flash point | Non-flammable |
LD50 | 4090 mg/kg (rat, oral) |
Related compounds | |
Other anions | Sodium bicarbonate |
Other cations | Lithium carbonate Potassium carbonate Rubidium carbonate Caesium carbonate |
Related compounds | Ammonium carbonate Natron Sodium percarbonate |
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